| /* DecodeRGB24.java -- |
| Copyright (C) 2005 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package gnu.javax.imageio.bmp; |
| |
| import java.io.IOException; |
| import javax.imageio.stream.ImageInputStream; |
| import java.awt.image.BufferedImage; |
| import java.awt.Dimension; |
| |
| public class DecodeRGB24 extends BMPDecoder { |
| |
| public DecodeRGB24(BMPFileHeader fh, BMPInfoHeader ih){ |
| super(fh, ih); |
| } |
| |
| public BufferedImage decode(ImageInputStream in) throws IOException, BMPException { |
| skipToImage(in); |
| |
| Dimension d = infoHeader.getSize(); |
| int h = (int)d.getHeight(); |
| int w = (int)d.getWidth(); |
| BufferedImage image = new BufferedImage(w, h, |
| BufferedImage.TYPE_INT_RGB); |
| // BMP scanlines are padded to dword offsets |
| int scansize = ((w*3 & 3) != 0)? w*3 + 4 - (w*3 & 3): w*3; |
| int[] data = new int[w*h]; |
| |
| for(int y=h-1;y>=0;y--){ |
| byte[] scanline = new byte[scansize]; |
| if(in.read(scanline) != scansize) |
| throw new IOException("Couldn't read image data."); |
| |
| for(int x=0;x<w;x++) |
| data[x + y*w] = scanline[x*3] + |
| (scanline[x*3+1] << 8) + |
| (scanline[x*3+2] << 16); |
| } |
| image.setRGB(0, 0, w, h, data, 0, w); |
| return image; |
| } |
| |
| } |